Art project ideas and techniques for students up to grade 12. Crayola provides great school resources, and not just for art teachers. An amazing array of lesson plans and other useful content. Some of the content does require (free) registration.
Free art project ideas for your classroom abound at Art Teacher on the Net. Photos and step by step instructions for projects.
Great ideas for using digital cameras in the classroom. Check out the resources and inspiration as well as lesson plans from Kodak.